Divergent Synthesis of Multisubstituted Tetrahydrofurans and Pyrrolidines via Intramolecular Aldol‐type Trapping of Onium Ylide Intermediates
作者:Changcheng Jing、Dong Xing、Lixin Gao、Jia Li、Wenhao Hu
DOI:10.1002/chem.201503621
日期:2015.12.21
divergent strategy for the synthesis of multisubstituted tetrahydrofurans and pyrrolidines, starting from easily accessible β‐hydroxyketones or β‐aminoketones to react with diazo compounds. Under RhII catalysis, this transformation is proposed to proceed through a metal–carbene‐induced oxonium ylide or ammonium ylide formation followed by an intramolecular aldol‐type trapping of these active intermediates
本文报道了从容易获得的β-羟基酮或β-氨基酮与重氮化合物反应开始的多取代四氢呋喃和吡咯烷合成的不同策略。在Rh II催化下,这种转化被提议通过金属-卡宾诱导的氧鎓叶立德或铵叶立德的形成而进行,随后是这些活性中间体的分子内醇醛型捕获。以高收率合成了一系列高度取代的四氢呋喃和吡咯烷,非对映选择性好。初步生物学评估表明,两种类型的杂环均显示出良好的PTP1B抑制活性。